[Marble-devel] Marble with offline OSM maps

[Jeremie Scheer]

Ok I will try with OSM raw files first to see if it corresponds to my needs.
But as I can see and as you describe it, Marble seems very easy to use 
to get pre-rendered bitmaps of particular regions of the world.

> You can transfer the contents of the directory to your device and 
> they'll be automatically found and used by Marble and also 
> applications using Marble as a library (assuming you transfer it to 
> the right directory on the device). The directory must not be user 
> specific, you can also use Marble's system directory (where 
> openstreetmap.dgml gets installed to).
The map installation directory can be in another path than Marble's 
system directory ? My maps will be installed on a SD card that will be 
inserted in the system, so how can I set the map directory to another 
location in the application code ?

Thank you,
-- 
Jérémie Scheer
Software Engineer
Tel: +33 (0)9 72 29 41 44
Fax: +33 (0)9 72 28 79 26
ARMadeus Systems - A new vision of the embedded world
http://www.armadeus.com


PS: Excuse me Dennis Nienhüser for the double mail


On 05/15/2012 02:58 PM, Torsten Rahn wrote:
> Hi Jeremie,
>
> On Dienstag, 15. Mai 2012 14:29:15 Jeremie Scheer wrote:
>>> You might want to default to Mercator projection in Marble since that
>>> delivers the best speed.
>> How can you do that ? Is there a method in the code to default to Mercator
>> ?
> See part 2 of the Tutorial I referenced in my previous mail:
>
> http://techbase.kde.org/Projects/Marble/MarbleMarbleWidget
>
> As you can see there is a line
>
>   mapWidget->setProjection( Mercator );
>
> which does this exactly.
>
>>> It's trivially easy to preload the tiled bitmaps
>> Where can you find tiled bitmaps from OSM on the Internet ? Or OSM files
>> must be transformed to tiled bitmaps with Mapnik first ?
> See the user documentation:
>
> http://docs.kde.org/stable/en/kdeedu/marble/download-region.html
>
> You can use the normal Marble client to download bitmap tile data right from
> the OpenStreetMap servers.
>
> Note that there are OSM server restrictions to the download of a single query
> (Marble's UI will inform you about those).
>
> Make sure that the hard disc cache is big enough so that Marble will not
> automatically start to delete the data you are downloading. By default it
> measures around 300 MB which you might want to increase depending on the
> amount of data you want to keep:
>
> http://docs.kde.org/stable/en/kdeedu/marble/configcacheproxy.html
>
> The data for OSM will end up inside
>
> ~/.local/share/marble/maps/earth/openstreetmap
>
> You can either copy it into the very same place on your target device - or -
> you put it into the system wide place which might be e.g.:
>
> /usr/local/share/marble/data/maps/earth/openstreetmap
>
> (start Marble with "marble --debug-info" on the command line and look for the
> first few lines of output which looks like this:
> System Path: "/usr/local/share/apps/marble/data"
> This will tell you the correct place for your system data where
> "maps/earth/openstreetmap" needs to get created inside )
>
> If you keep it in the home directory on the target device then you also need
> to apply the cache limit settings on the MarbleWidget used on the device -
> otherwise Marble will delete excessive data automatically. So putting it into
> the System Path might be the better solution.
>
> Of course the alternative would still be to create bitmap tiles via Mapnik on
> demand on your own server. That would require some additional magic on your
> own server however.
>
>> Now if I have tiled bitmaps, how can I use them in Marble library being
>> offline ?
> You can use it right away if it's placed in the correct location on your hard
> disc. See above. :-)
>
> Best Regards,
>
> Torsten
>
>
>
>> Regards,
>>
>>> Am 15.05.2012 12:29, schrieb Torsten Rahn:
>>>> As you can see there are still a few things missing (road labels,
>>>> etc.) but we gladly accept patches ;) Note that Marble currently only
>>>> support import of single files. So there is no "tile management" as
>>>> it exists for the OSM bitmap map theme.
>>>>
>>>>> Is it possible to do that with Marble ? And if so, could you explain me
>>>>> the way it can be done (directly by code and not in Marble menus) ?
>>> It's also useful to know that there's a GSOC project this year by
>>> Ander that will further improve our OSM vector rendering towards
>>> making it end-user ready.
>>>
>>> Regards,
>>> Dennis
>>>
>>> _______________________________________________
>>> Marble-devel mailing list
>>> Marble-devel at kde.org
>>> https://mail.kde.org/mailman/listinfo/marble-devel
>> _______________________________________________
>> Marble-devel mailing list
>> Marble-devel at kde.org
>> https://mail.kde.org/mailman/listinfo/marble-devel
> _______________________________________________
> Marble-devel mailing list
> Marble-devel at kde.org
> https://mail.kde.org/mailman/listinfo/marble-devel
>


-- 
Jérémie Scheer
Software Engineer
Tel: +33 (0)9 72 29 41 44
Fax: +33 (0)9 72 28 79 26
ARMadeus Systems - A new vision of the embedded world
http://www.armadeus.com